Steering Components, A Corporation

Identification

Identify your pump or gear online

Type the code stamped on the unit and we will break it down segment by segment, or search our medium and heavy duty part number tables. Still unsure? Call 714-572-3656 with your tag numbers.

Download full catalog (PDF)Parts lookup

Medium & heavy duty pump identification

Pumps are identified by five physical features. Take these measurements before ordering — the model number follows directly from them.

  1. 1 · Body size (measurement A)

    Eaton U model: small rotor measures 1-7/8 in., large rotor 2-1/8 in. Eaton Hobourn BB: small rotor 2-1/4 in., large rotor 2-3/4 in.

  2. 2 · Inlet

    No inlet, 5/8 in., or 3/4 in. — measured at the reservoir / manifold mount face.

  3. 3 · Pressure port

    5/8 in. inverted flare, 3/4-16 O-ring, or 1/4 in. NPT.

  4. 4 · Shaft / drive

    Single pulley 9/16 in. or double pulley 7/8 in.; on medium and heavy duty units record splined vs keyed and overall shaft length.

  5. 5 · Rotation

    Viewed from the shaft end. R suffix = counterclockwise. Caterpillar engines and driver's-side Detroit installs are usually counterclockwise.

Medium & heavy duty pump families

3340X / 3345X

Ford · Navistar · Volvo

  • 3340X — front axle weight to 14,000 lbs
  • 3345X — front axle weight over 14,000 lbs
  • Rear mounted reservoir
  • Pulley driven · shaft length 1 in.

3350X / 3355X

Ford · Mack

  • 3350X — front axle weight to 14,000 lbs
  • 3355X — front axle weight over 14,000 lbs
  • Rear mounted reservoir
  • Splined shaft · shaft length 1.88 in.

3360X / 3360RX / 3365X / 3365RX

Ford · Navistar

  • 3360X / 3360RX — front axle weight to 14,000 lbs
  • 3365X / 3365RX — front axle weight over 14,000 lbs
  • Rear mounted reservoir · splined shaft
  • Shaft length 2 1/2 in.
  • R = counterclockwise rotation (typical on Caterpillar engines)

3370X / 3375X

Ford · Navistar · White · Autocar

  • 3370X — front axle weight to 14,000 lbs
  • 3375X — front axle weight over 14,000 lbs
  • Rear mounted reservoir · splined shaft
  • Shaft length 3 1/4 in.

3380X / 3380RX / 3385X / 3385RX

Ford · Navistar

  • 3380X / 3380RX — front axle weight to 14,000 lbs
  • 3385X / 3385RX — front axle weight over 14,000 lbs
  • Keyed / nut retained shaft · shaft length 3 1/2 in.
  • R = counterclockwise (driver's side of Detroit engines)

3390X / 3390RX / 3395X / 3395RX

Ford · Navistar

  • 3390X / 3390RX — front axle weight to 14,000 lbs
  • 3395X / 3395RX — front axle weight over 14,000 lbs
  • Keyed / nut retained shaft · shaft length 4 3/8 in.
  • R = counterclockwise (driver's side of Detroit engines)

Eaton U model reservoir / manifold mount pumps

ModelPulleyPressure portInletRotor (measurement A)
3315XSingle5/8 inverted flareNo inletSmall (1-7/8 in.)
3316XSingle5/8 inverted flareNo inletLarge (2-1/8 in.)
3320XDouble5/8 inverted flareNo inletSmall (1-7/8 in.)
3321XDouble5/8 inverted flareNo inletLarge (2-1/8 in.)
3322XDouble5/8 inverted flare5/8 in.Small (1-7/8 in.)
3325XSingle5/8 inverted flare5/8 in.Small (1-7/8 in.)
3330XDouble5/8 inverted flare3/4 in.Small (1-7/8 in.)
3331XDouble5/8 inverted flare3/4 in.Large (2-1/8 in.)
3334XSingle3/4-16 O-ringNo inletSmall (1-7/8 in.)
3335XSingle3/4-16 O-ringNo inletLarge (2-1/8 in.)
3336XDouble3/4-16 O-ringNo inletLarge (2-1/8 in.)

Parker Hannifin steering pumps

Freightliner · Navistar · Peterbilt

Stamped numbers, e.g. H39AT1AA1504DAS, H49BT2AA17560DS, H90CY2CA17560BS

ZF steering pumps

Freightliner · Ford · Mack · Navistar · PACCAR · Volvo

ZF stamped numbers from the housing or tag, e.g. 7673955321, 7674955272, 7677955179

Reservoirs & filters

2 quart

Reservoir 91085G

Filter 84365A

4 quart

Reservoir 91410A

Filter 83804E

9 quart

Reservoir 91417A

Filter 83804E

Heavy duty steering gear identification

Heavy duty gears are identified by series prefix plus build code. Read the whole string from the tag or housing — a single digit changes ports, shafts and axle rating.

TAS (TAS40, TAS55, TAS65, TAS85)

TRW / Ross

The number after TAS is the frame size — larger frame = higher front axle rating. The trailing digits are the assembly variation, and our X suffix marks a Steering Components remanufactured unit.

Typical applications: Freightliner, Kenworth, Peterbilt, Navistar, Ford conventional and cabover, front axle 6,000–22,000 lbs

Information needed

  • Full TAS number from the tag or housing casting
  • Front axle weight rating
  • Input shaft spline count and diameter
  • Pitman arm output shaft spline and taper

HFB / HF (HF64, HFB64, HFB70)

TRW / Ross

HF64 and HFB64 are 12,000 lb class; HFB70 covers 16,000 lbs and up. The four digits following the frame size are the build code — read them exactly, one digit changes the ports and shaft.

Typical applications: Ford LTL/LN, Mack R/MR/MH, Kenworth K100/K136, Freightliner conventional

Information needed

  • Complete HF / HFB build number
  • Number of hydraulic ports (2 port vs 4 port)
  • Output shaft length (4.00, 4.25, 4.50, 4.75, 5.50 in. on Mack R models)
  • Input shaft diameter (13/16 in. on early Ford LTL9000)

M100 / M110 (M100PDZ1X, M110PBQ1X …)

TRW

M100 is the standard heavy duty frame, M110 the high-capacity frame used from 16,000 lbs up. The three letters and digit after the frame are the OEM build code — transcribe the whole string.

Typical applications: Kenworth C500/T400/T800/W900, Mack CH600 SBA & SFA, Freightliner set-back and set-forward axle

Information needed

  • Full stamped code including the trailing digit
  • Master or slave position when used in a dual-gear setup
  • Set back axle (SBA) or set forward axle (SFA)

292 / 392 / 492 / 592 series

Sheppard

The first digit is the number of turns/valve generation, the suffix letters are the OEM variant (for example 392-SCB4X, 292-SEX6X). Sheppard slave gears in dual setups carry their own suffix — record both gears.

Typical applications: Kenworth C500/W900 conventional, Freightliner cabover, dual-gear vocational trucks

Information needed

  • Complete series and suffix from the housing tag
  • Master or slave position
  • Input shaft spline and pitman arm spline

ZF 8098 / 8090 servocom

ZF

ZF gears and pumps carry a seven-digit stamped number (for example 7673 955 321) on the housing or the tag. That number, not the truck model, is what identifies the unit.

Typical applications: Freightliner, Ford, Mack, Navistar, PACCAR, Volvo

Information needed

  • Seven-digit ZF number from the housing stamp or tag
  • Photograph of the tag if the stamp is worn
  • Input and output shaft details

Steering gear application finder

Pick your truck make and model to see the heavy duty gears we build for it — with casting number, line count, gear type and the OEM numbers they replace. You can also search straight by gear, casting or OEM number.

Pick a make or type a gear, casting or OEM number to see applications.

Applications are a guide only — confirm against the tag or casting on your unit, or call 714-572-3656 with the numbers and we will confirm the gear.

Seal, bearing & repair kits

Kit numbers for the gear and pump families we rebuild. Numbers marked “verify” come from aftermarket cross-references — call us and we will confirm the exact kit for your build before you order.

No kit matches that filter. Call 714-572-3656 with your gear or pump tag and we will pull the right kit.

Online code decoder

Vickers V10 / V20

Vane pump model codes stamped on the pump body. Every position is decoded: cover, mounting, ports, ring capacity, shaft, pressure setting and rotation.

Try

Eaton Hobourn BB

BB model codes read left to right: body type and rotation, shaft type, orifice size, pressure setting, then port suffixes.

Try
  • ▸ Pumps mounted on Caterpillar engines are usually counterclockwise rotation.
  • ▸ Pumps mounted on the driver's side of Detroit engines are usually counterclockwise rotation.

Part number lookup

Medium and heavy duty pump tables from our catalog, searchable by part number, application or physical feature.

Saginaw pumps

Chevrolet / GMC — identify by housing diameter and mounting hole position

Part numberApplicationHousingDistinguishing detail
3300XChev / GMCBushing housing 1-1/2"Bushing housing, smallest diameter
3305XChev / GMCBearing housing 2"Mounting hole 1/2" from outer diameter
3310XChev / GMCBearing housing 2"Mounting hole 1" from outer diameter

Eaton U model pumps

Need shaft size, pressure port, inlet size and body size (measurement A: small rotor 1-7/8", large rotor 2-1/8")

Part numberShaftPressure portInletBody / rotor
3315XSingle pulley 9/16"5/8" inverted flareNo inletSmall rotor
3316XSingle pulley 9/16"5/8" inverted flareNo inletLarge rotor
3320XDouble pulley 7/8"5/8" inverted flareNo inletSmall rotor
3321XDouble pulley 7/8"5/8" inverted flareNo inletLarge rotor
3322XDouble pulley 7/8"5/8" inverted flare5/8" inletSmall rotor
3325XSingle pulley 9/16"5/8" inverted flare5/8" inletSmall rotor
3326XSingle pulley 9/16"5/8" inverted flare5/8" inletSmall rotor
3330XDouble pulley 7/8"5/8" inverted flare3/4" inletSmall rotor
3331XDouble pulley 7/8"5/8" inverted flare3/4" inletLarge rotor
3334XSingle pulley 9/16"3/4-16 o-ringNo inletSmall rotor
3335XSingle pulley 9/16"3/4-16 o-ringNo inletLarge rotor
3336XDouble pulley 7/8"3/4-16 o-ringNo inletLarge rotor

Eaton B model pumps

All rear mounted reservoir. Identify by shaft type and shaft length, then front axle weight. R suffix = counterclockwise rotation.

Part numberApplicationFront axle weightShaftShaft length
3340XFord / Navistar / VolvoTo 14,000 lbPulley driven1"
3345XFord / Navistar / VolvoOver 14,000 lbPulley driven1"
3350XFord / MackTo 14,000 lbSplined1-5/8"
3355XFord / MackOver 14,000 lbSplined1-5/8"
3360X / 3360RXFord / NavistarTo 14,000 lbSplined2-1/2"
3365X / 3365RXFord / NavistarOver 14,000 lbSplined2-1/2"
3370XFord / Navistar / White / AutocarTo 14,000 lbSplined3-1/4"
3375XFord / Navistar / White / AutocarOver 14,000 lbSplined3-1/4"
3380X / 3380RXFord / NavistarTo 14,000 lbKeyed / nut retained3-1/2"
3385X / 3385RXFord / NavistarOver 14,000 lbKeyed / nut retained3-1/2"
3390X / 3390RXFord / NavistarTo 14,000 lbKeyed / nut retained4-3/8"
3395X / 3395RXFord / NavistarOver 14,000 lbKeyed / nut retained4-3/8"

Heavy duty gears & ZF pumps — what we need from the tag

Sheppard gears

M80, M90, M100, M110, HD94, SD110, XD120

Common applications

Navistar · Mack · Paccar · Freightliner

Information needed

  • Sheppard stamped model number (letters followed by a number)
  • Sheppard cast number
  • OEM number
  • Year, make, model or VIN

The cast number followed by the stamped model number gives the part number for the correct gear.

TRW / Ross gears

TAS40, TAS55, TAS65, TAS85, THP45, THP60

Common applications

Blue Bird · Ford · Freightliner · GMC · Mack · Navistar · Paccar · Volvo · White

Information needed

  • TRW / Ross stamped model number — letters followed by five digits (example: TAS40007 180 93)
  • OEM number
  • Year, make, model or VIN

The stamped number is on the plate on the gear housing.

ZF pumps

ZF steering pumps

Common applications

Freightliner · Ford · Mack · Navistar · Paccar · Volvo

Information needed

  • ZF stamped numbers from the pump body or tag
  • Examples: 7673955321, 7674955272, 7674955343, 7677955179

Give us the full ten digit stamped number — the last digits identify the variant.

Printed identification guides

The same information in the original catalog pages, with photos and measurement diagrams. Open a guide in a new tab to read it full screen, or download it for the shop.

Medium & heavy duty pumps

Catalog pages 15–23

Open guideDownload PDF

Heavy duty steering gears

Catalog pages 39–43 · updated 9/2023

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Steering gear application guide

1975–2018 · 500+ truck applications

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Full product catalog

Complete gear, pump, cylinder & kit catalog

Open guideDownload PDF